<html>
<head>
<script type="text/javascript">
function formSubmit()
  {
  document.getElementById("myForm").submit()
  }
</script>
</head>

<body>

<form id="myForm" action="js_form_action.asp" method="get">
Firstname: <input type="text" name="firstname" size="20"><br />
Lastname: <input type="text" name="lastname" size="20"><br />
<br />
<input type="button" onclick="formSubmit()" value="Submit">
</form>
</body>

</html>